Equivalent & Substitute Parts for Honeywell 381N5K Potentiometer

Part Overview

The Honeywell 381N5K is a 5k Ohm 1 Watt linear panel mount potentiometer featuring conductive plastic resistive material and solder lug termination. This component is classified as obsolete, necessitating identification of active substitute parts for ongoing applications and new designs. The 381N5K series represents a legacy product line, and equivalent alternatives are required to maintain supply chain continuity and support existing circuit implementations.

Substiute Parts

381N5K

Honeywell Sensing and Productivity SolutionsIn Stock: 758381N5K Datasheet

Current PartRFQ

RES5K0E

OhmiteIn Stock: 866RES5K0E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 381N5K is determined by strict equivalence across the following parameters:

Mandatory Matching Parameters:

• Resistance value: 5k Ohm
• Taper characteristic: Linear
• Number of gangs: 1
• Mounting configuration: Panel Mount
• Termination method: Solder Lug
• Bushing thread specification: 1/4-32
• Rotation angle: 300°
• Tolerance: ±10%

Allowable Variation Parameters:

• Power rating: Substitute parts may exceed the 1W specification, provided the higher rating does not introduce incompatibility with the circuit design envelope
• Resistive material: Substitutes may employ wirewound or conductive plastic construction
• Product status: Active substitutes are preferred over obsolete alternatives

The Ohmite RES5K0E qualifies as a functional substitute based on matching all mandatory parameters while providing enhanced power handling capability (12.5W versus 1W).

Parameter Comparison

Engineering Selection Recommendations

The Ohmite RES5K0E potentiometer is qualified as a direct substitute for the Honeywell 381N5K based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical resistance (5k Ohm), tolerance (±10%), and linear taper characteristics. The RES5K0E power rating of 12.5W exceeds the original 1W specification, providing enhanced thermal margin without introducing electrical incompatibility.

Mechanical Compatibility: Panel mount configuration, solder lug termination, 1/4-32 bushing thread, 300° rotation angle, and slotted actuator specifications are identical between the two components. Physical mounting and circuit integration proceed without modification.

Regulatory Compliance: Both components maintain RoHS compliance and MSL Level 1 (Unlimited) moisture sensitivity classification, satisfying environmental and reliability requirements.

Product Status Advantage: The RES5K0E is classified as active product status, ensuring ongoing availability and supply chain support, whereas the 381N5K is obsolete.

Material Consideration: The RES5K0E employs wirewound resistive material compared to the conductive plastic construction of the 381N5K. This material difference does not affect substitution validity for applications within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite RES5K0E directly replace the Honeywell 381N5K in existing circuits?

A: Yes. The RES5K0E matches all critical electrical and mechanical parameters: 5k Ohm resistance, ±10% tolerance, linear taper, 1 gang configuration, panel mount, solder lug termination, 1/4-32 bushing thread, and 300° rotation. Direct substitution is valid without circuit modification.

Q: Why does the RES5K0E have a higher power rating (12.5W vs. 1W)?

A: The RES5K0E is designed for applications requiring greater thermal dissipation capability. The higher power rating does not create incompatibility; it provides additional operational margin. Circuit design must still respect the original 1W power budget unless the application is redesigned to utilize the enhanced capability.

Q: Are there packaging differences between these components?

A: The Honeywell 381N5K is specified with "-" packaging notation. The Ohmite RES5K0E is supplied in Bulk packaging. Both components feature identical panel mount mechanical interfaces and solder lug termination, ensuring compatibility in assembly processes.

Q: What is the difference between conductive plastic and wirewound resistive materials?

A: The 381N5K uses conductive plastic material; the RES5K0E uses wirewound construction. Both materials achieve the specified 5k Ohm resistance and ±10% tolerance. Wirewound construction typically offers superior temperature stability and power handling. Material selection does not affect substitution validity for applications operating within the specified electrical parameters.

Q: Is the RES5K0E RoHS compliant?

A: Yes. The Ohmite RES5K0E is RoHS compliant and maintains MSL Level 1 (Unlimited) moisture sensitivity classification, matching the regulatory status of the Honeywell 381N5K.

Q: Why is the Honeywell 381N5K classified as obsolete?

A: Obsolete classification indicates the component is no longer manufactured or supported by Honeywell. The RES5K0E, classified as active product status, represents the current equivalent for ongoing applications and new designs.